The technological properties of particleboards manufactured with nano additive melamine-formaldehyde adhesive

Abstract

In the present study, the effect of nano additives in different ratios added to melamine formaldehyde adhesives on the properties of particleboards was investigated. In this respect, two different nanoclays [organo-modified nanoclays (OMC) and unmodified nanoclays (NC)] and graphene nanoplatelet (GNP) were added to the adhesive at the rate of 1%, 2% and 4%. Along with the physical (thickness swelling and water absorption), mechanical properties (modulus of rupture, modulus of elasticity and internal bond strength), accelerated weathering and fire resistance tests (Limiting oxygen index-LOI) of the board were carried out. According to the results, while there was no significant change in the water absorption values with the use of nano additives, a decrease occurred in the thickness swelling values with the use of GNP. The mechanical properties increased with the use of nano additives. The highest values were obtained from the board groups using 1% GNP. The loss of mechanical resistance values after the accelerated weathering test was reduced with the use of 1% nanoclay and up to 2% GNP. According to LOI test results, the use of 1% and 2% nano additives increased the fire resistance of the boards., The agglomerations were determined in places with the increase in the nano additive ratio in the SEM images.